teemperor updated this revision to Diff 251184.
teemperor added a comment.
- Rebased the patch.
This has been (really) delayed because of the whole unit test I wanted to
write, but I'll just land this as-is (as having this broken even longer just
because I haven't written that new unit test seems silly).
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D68010/new/
https://reviews.llvm.org/D68010
Files:
lldb/include/lldb/DataFormatters/StringPrinter.h
lldb/source/DataFormatters/StringPrinter.cpp
lldb/source/Plugins/Language/ObjC/NSString.cpp
lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/TestDataFormatterNSString.py
lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/main.m
Index: lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/main.m
===================================================================
--- lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/main.m
+++ lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/main.m
@@ -17,6 +17,7 @@
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
+ NSString *empty = @"";
NSString *str0 = [[NSNumber numberWithUnsignedLongLong:0xFF] stringValue];
NSString *str1 = [NSString stringWithCString:"A rather short ASCII NSString object is here" encoding:NSASCIIStringEncoding];
NSString *str2 = [NSString stringWithUTF8String:"A rather short UTF8 NSString object is here"];
@@ -69,6 +70,7 @@
NSArray *components = @[@"usr", @"blah", @"stuff"];
NSString *path = [NSString pathWithComponents: components];
+ NSString *empty_path = [empty stringByDeletingPathExtension];
const unichar someOfTheseAreNUL[] = {'a',' ', 'v','e','r','y',' ',
'm','u','c','h',' ','b','o','r','i','n','g',' ','t','a','s','k',
Index: lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/TestDataFormatterNSString.py
===================================================================
--- lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/TestDataFormatterNSString.py
+++ lldb/test/API/functionalities/data-formatter/data-formatter-objc/nsstring/TestDataFormatterNSString.py
@@ -76,8 +76,8 @@
self.expect('frame variable hebrew', substrs=['לילה טוב'])
def nsstring_data_formatter_commands(self):
- self.expect('frame variable str0 str1 str2 str3 str4 str5 str6 str8 str9 str10 str11 label1 label2 processName str12',
- substrs=[
+ self.expect('frame variable empty str0 str1 str2 str3 str4 str5 str6 str8 str9 str10 str11 label1 label2 processName str12',
+ substrs=['(NSString *) empty = ', ' @""',
# '(NSString *) str0 = ',' @"255"',
'(NSString *) str1 = ', ' @"A rather short ASCII NSString object is here"',
'(NSString *) str2 = ', ' @"A rather short UTF8 NSString object is here"',
@@ -104,6 +104,8 @@
self.expect('expr -d run-target -- path', substrs=['usr/blah/stuff'])
self.expect('frame variable path', substrs=['usr/blah/stuff'])
+ self.expect('expr -d run-target -- empty_path', substrs=['@""'])
+ self.expect('frame variable empty_path', substrs=['@""'])
def nsstring_withNULs_commands(self):
"""Check that the NSString formatter supports embedded NULs in the text"""
Index: lldb/source/Plugins/Language/ObjC/NSString.cpp
===================================================================
--- lldb/source/Plugins/Language/ObjC/NSString.cpp
+++ lldb/source/Plugins/Language/ObjC/NSString.cpp
@@ -170,6 +170,7 @@
options.SetStream(&stream);
options.SetQuote('"');
options.SetSourceSize(explicit_length);
+ options.SetHasSourceSize(has_explicit_length);
options.SetNeedsZeroTermination(false);
options.SetIgnoreMaxLength(summary_options.GetCapping() ==
TypeSummaryCapping::eTypeSummaryUncapped);
@@ -182,6 +183,7 @@
options.SetProcessSP(process_sp);
options.SetStream(&stream);
options.SetSourceSize(explicit_length);
+ options.SetHasSourceSize(has_explicit_length);
options.SetNeedsZeroTermination(false);
options.SetIgnoreMaxLength(summary_options.GetCapping() ==
TypeSummaryCapping::eTypeSummaryUncapped);
@@ -199,6 +201,7 @@
options.SetStream(&stream);
options.SetQuote('"');
options.SetSourceSize(explicit_length);
+ options.SetHasSourceSize(has_explicit_length);
options.SetIgnoreMaxLength(summary_options.GetCapping() ==
TypeSummaryCapping::eTypeSummaryUncapped);
options.SetLanguage(summary_options.GetLanguage());
@@ -221,6 +224,7 @@
options.SetStream(&stream);
options.SetQuote('"');
options.SetSourceSize(explicit_length);
+ options.SetHasSourceSize(has_explicit_length);
options.SetNeedsZeroTermination(!has_explicit_length);
options.SetIgnoreMaxLength(summary_options.GetCapping() ==
TypeSummaryCapping::eTypeSummaryUncapped);
@@ -241,6 +245,7 @@
options.SetStream(&stream);
options.SetQuote('"');
options.SetSourceSize(explicit_length);
+ options.SetHasSourceSize(has_explicit_length);
options.SetNeedsZeroTermination(!has_explicit_length);
options.SetIgnoreMaxLength(summary_options.GetCapping() ==
TypeSummaryCapping::eTypeSummaryUncapped);
@@ -263,6 +268,7 @@
options.SetProcessSP(process_sp);
options.SetStream(&stream);
options.SetSourceSize(explicit_length);
+ options.SetHasSourceSize(has_explicit_length);
options.SetNeedsZeroTermination(!has_explicit_length);
options.SetIgnoreMaxLength(summary_options.GetCapping() ==
TypeSummaryCapping::eTypeSummaryUncapped);
@@ -286,6 +292,7 @@
options.SetProcessSP(process_sp);
options.SetStream(&stream);
options.SetSourceSize(explicit_length);
+ options.SetHasSourceSize(has_explicit_length);
options.SetIgnoreMaxLength(summary_options.GetCapping() ==
TypeSummaryCapping::eTypeSummaryUncapped);
options.SetLanguage(summary_options.GetLanguage());
Index: lldb/source/DataFormatters/StringPrinter.cpp
===================================================================
--- lldb/source/DataFormatters/StringPrinter.cpp
+++ lldb/source/DataFormatters/StringPrinter.cpp
@@ -525,27 +525,33 @@
if (!options.GetStream())
return false;
- uint32_t sourceSize = options.GetSourceSize();
+ uint32_t sourceSize;
bool needs_zero_terminator = options.GetNeedsZeroTermination();
bool is_truncated = false;
const auto max_size = process_sp->GetTarget().GetMaximumSizeOfStringSummary();
- if (!sourceSize) {
+ if (options.HasSourceSize()) {
+ sourceSize = options.GetSourceSize();
+ if (!options.GetIgnoreMaxLength()) {
+ if (sourceSize > max_size) {
+ sourceSize = max_size;
+ is_truncated = true;
+ }
+ }
+ } else {
sourceSize = max_size;
needs_zero_terminator = true;
- } else if (!options.GetIgnoreMaxLength()) {
- if (sourceSize > max_size) {
- sourceSize = max_size;
- is_truncated = true;
- }
}
const int bufferSPSize = sourceSize * type_width;
lldb::DataBufferSP buffer_sp(new DataBufferHeap(bufferSPSize, 0));
- if (!buffer_sp->GetBytes())
+ // Check if we got bytes. We never get any bytes if we have an empty
+ // string, but we still continue so that we end up actually printing
+ // an empty string ("").
+ if (sourceSize != 0 && !buffer_sp->GetBytes())
return false;
Status error;
Index: lldb/include/lldb/DataFormatters/StringPrinter.h
===================================================================
--- lldb/include/lldb/DataFormatters/StringPrinter.h
+++ lldb/include/lldb/DataFormatters/StringPrinter.h
@@ -115,9 +115,15 @@
lldb::ProcessSP GetProcessSP() const { return m_process_sp; }
+ void SetHasSourceSize(bool e) { m_has_source_size = e; }
+
+ bool HasSourceSize() const { return m_has_source_size; }
+
private:
uint64_t m_location = 0;
lldb::ProcessSP m_process_sp;
+ /// True iff we know the source size of the string.
+ bool m_has_source_size = false;
};
class ReadBufferAndDumpToStreamOptions : public DumpToStreamOptions {
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